Influence of Pile Spacing to Immediate Settlement of Short Piled Raft Foundation System on Peat Soil under Static Load

Suro, Sajiharjo Marto and Kusumastuti, Dyah Pratiwi Influence of Pile Spacing to Immediate Settlement of Short Piled Raft Foundation System on Peat Soil under Static Load. In: 25 rd Annual National Conference on Geotechnical Engineering, 9 -10 November 2021, Jakarta (Webinar).

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Abstract

Short piled raft foundation system is a modified piled raft, which the pile length is relatively shorter. Pile spacing is an important variable parameter, related to immediate settlement. Therefore, the influence of pile spacing need to be studied. Finite element method was used to simulate the stability performance. Short Piled Raft foundation system with concrete slab of 7.0 m x 7.0 m square and thickness of 0.15 m was assumed to be built on 3.5 m peat layer. The outer diameter of pile was 0.32 m and pile length was 3.00 m, while the pile spacing varied from 0.50 to 3.00 m. Point load varied from 0 to 100 kN was considered as a static load, acted on the centre of the concrete slab. By comparing each numerical result of simulations, it could be concluded that 1.00 m pile spacing was an optimal one, produced immediate settlement of 31.80 mm.

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